The present invention provides a rubber composition which when vulcanized may be used to form a safety support intended to be mounted on a wheel rim within a tire. The manipulation lever connection structure for a vehicle includes an arm for operating a driving changeover device and for connecting a wire which extends from a manipulation lever to the arm. The memory core is formed of an alloy which is in a crystallographically stable state before writing or at the time of data recording and in which a non-equilibrium state accompanying with a solid-solid phase transition can be achieved during temperature increase.